Upsetting tool for hollow rivets



March 2,1948. R. H. GILL T 2,437,191

UPSETTING TOOL FOR HOLLOW RIVETS Filed Dec. 24, 1941 4 Sheets-Sheet 1 MEL March 2, 1948; 7 "R; H .'GILL 2,437,191

UIIISETTING} T o'L FOR HOLLOW RIVETS Filed Dec. 24, 1941 4 Sheets-Sheet 2 March 2, 1948. R ..H. GILL 7,

UPSETTING TOOL FOR HOLLOW RIVETS Filed Dec. 24, 1941 4 Sheets-Sheet s March 2, 1948. R. H. GILL 2,437,191

UPSETTING TOOL FOR HOLLOW RIVETS Filed Dec. 24, 1941 v 4 SheetE-Sheet 4 Patented Mar. 2, 1948 UNITED STATES @FFl C-E" UPSETTIN G TOOL FOR HOLLOW RIVETS Ray" H; Gill, Akron, Ohio, assignoi' to The B. F: Goodrich Company, New York, N. Y., a corporation of'New York 7 Application December 24, 1941;.Serial No. 424;297

13 Claims. (01. 21s 19) I ,1. This invention relates to tools forupsetting hollow internally threaded rivets and is especially useful for insertingand upsetting rivets of the hollow internally threaded type shown in -Waner Patents Nos. 2,149,199and 2,188,422.

In the manufacture, repair, and alteration of airplanes and other structures; having walls-of sheet material, it is often desirable to provide means for applying upsettingpressure axially of the rivet from one side of the wall, as where the opposite side is inaccessible. v

As the upsetting of such rivets requires com siderable force, and for uniformity of riveting, and security of fastening it is desirable that the rivets be upset uniformly andaccurately without fatigue of the-operator, it has been proposed to provide power-,operated, tools. for this purpose.

Such tools heretofore have been of intricate con-' struction and have developed structural weaknesses,l requiring frequent repairs, their cost has beennecessarily highbecause of, their intricate construction, and injury .to the 'WOlk has result ed dueto improper operation. Tools as proposed heretofore have had means-for moving a: draw rod or mandrel longitudinally with respect to a stationary anvil forholdingagainst the flanged head of the rivet. I As the draw rod, when insertedin' the rivet, has been out of-the 'operators' sight, it has been: difficult with suchtools for the operator to determine that the'tool has operated properlyin the upsettingoperation. Also in some cases :it. haszbeen difficult to; mount the :rivet on the rod prior to inserting the rivet in the aperture in the wall and: therefore difiicult to-operate in close places. Damagetothewall orrto the rivet' or both has sometimesoccurred becauserof ob-;

jectionable rotation of the improperly seated rivet.

The present. invention aims to overcome the foregoing and other difliculties and to provide a tool of improved construction and operation.

The principal objects of the invention are to provide a tool inwhich the movements ofth'e rivet-upsetting parts arevisibleito the operator,-

to providepower operated manipulation of the anvil, .to provide forum of lower'operating pressures, to provide positive" operation, to providefor conveniently mounting. the rivet on the tool before entering therivet in the wall aperture, to

provide a longitudinally movable but non-rotatable anvil structure, to provideimproved adap-- tion to different operating mechanism; to provide positive declutching where one power unit is employed for both rotative and retractive=-move-- ments, to provide a more rugged construction, to providefor easy replacement of parts,-and to provide speed of operation and lowcost.

These and other objects will appear from the following; description drawings.

Of the drawings:

and the accompanying Fig: l is a planview ofa rivet upsetting. tool constructed-in accordance with and embodying-- theinventio-n, parts being broken away.

Fig- 2' is a longitudinal sectional view of the" operating head thereof with the parts shown in" Figkfiis'a cross-sectional View taken-online" 5+5 of Fig. 2.

rig. Bis a side elevation of a modified form-'01 tool embodying the invention.

'7 is 'arear elevation thereof.

Fig. 8- ma longitudinal section thereoftakeii on line-88-of Fig. 7. r

Fig.9'is a sectional view ofthe valve taken on 1ine;9- 9 of Fig. 8, parts being broken away.

Fig. 10- is a, cross-sectional view of the anvil" operating. piston; an associated parts, taken on line- 10-10 f Fig. 8. r

Fig. 11 isa detail View of the anvil-pressing lever.

12 is asection-allview taken on line |2|2 Qf FigBQ Fig 13lis a-sectional view taken'on linef'l3'l3 of Fi'g; 8.

Fig. 141s. a diagram of the" valve and its"con= ne'ctions.

In accordance with-the' invention, a rotatable" rodliaving a threaded" end foren'gagin'gr" the threads of a riv'et is provided to"eXtend through an aperture-in an anvil, means are provided for rotating. the rod and preventing rotation of "the" anvil vvhile' a'rivet' is placed on the projecting threaded end of the "rod; and means are provided In addition to making possible operation insight" of the operator, the provision'for relativel'yf'ad' vancingtheanvil, as distinguished from merely" retracting the mandrel, provides further advan tages, including simplification of mechanism and" reliability ofoperation. In one form of the in vention both the rotative movement of the; rod and the relatively advancing. movement of the anvil areprovidedby a single driving means, op erated for example by compressed air, While in a modified-form of the invention these movements areaccomplishedby separate motors which maylie-operated from asingle control-means by. a I

single-source of pressure fluid. 7 Referring .to the drawings; and first to Figs -l I to 5 thereof, the numeral Ill designates amotor housing, the motor-having a' shaft ;l I adapted-to be rotatably driven in either direction. This motor may be operated by electricity or by fluid pressure, an air-operated motor being illustrated and preferred because it may be stalled without damage. Compressed air is supplied thereto from a flexible hose connected to an inlet nipple l2, and may be controlled by a valve operated by a lever I3 which in one position, indicated by the letter R, operates the shaft II in a right-hand direction, in another position, indicated by the letter L, operates the shaft in a left-hand direction, and in an intermediate position, illustrated in Fig. 1, shuts off the fluid pressure supply. The motor housing has a threaded reduced end I4 to which is secured a cylindrical housing I5 having a correspondingly threaded socket IS. The shaft I driven by motor ID, or otherwise, has threaded engagement with an extension, and for this purpose is formed with a reduced spindle II threaded to engage an extension or quill shaft I8 rotatably and slideably mounted within the housing I5. The quill shaft is internally threaded, as at I9 to fit the threaded spindle ll of the driving shaft. The shaft II is restrained against end movement with relation to the other, non-rotative parts of the motor and the housing I5 by suitable bearings (not shown). To provide for a strong grip between the ends of the shaft I I and the quill I8, a washer 20 of a compressed vulcanized fiber, or similar material having a high coefficient of friction against metal, may be inserted between the shafts about the spindle.

An anvil 2| for engaging the flange of a rivet 28 is slidably and non-rotatably fitted in the outboard or right end of housing I5 as seen in Fig. 1, and is provided with an outwardly directed radial flange 22 at its innermost end. An inwardly directed radial flange 23 is formed at the outboard end of housing I5 and a compression coil spring 24 is compressed between the flanges in an annular cavity 25 therebetween and about the anvil. The anvil has an axial bore which slidably fits over a rivet engaging rod 26 rotatably and slidably journaled therein. The rod is threaded at its outer end, as at 21 to engage the threaded bore of the rivet 28. The opposite end of the rod is secured in the axial bore of a chuck 29 as screw 3|, and a screw plug 45 may be provided to close. the opening 42. Where the shaft II is rotatably supported immecliately adjacent its screw connection to the by threads 3|) and a set screw 3|. The chuck 29 is slidably mounted in the bore of'the quill I8. To lock the chuck against rotation with respect to the quill, a cross-pin 32 is fixed through the chuck with its ends extending radially through axial slots 33, 34, formed through opposite sides of the quill I8. The arrangement is such that the rod 26 must rotate with the quill l8, but one may be moved axially of the other within the limits of the slots. Movement of the rod 28 outwardly of the housing is further limited by a shoulder 35 provided by a bushing 36 of hardened steel fixed in the housing I5 between the cross-pin 32 and the outboard end of the housing in the path of movement of the radially projecting ends of the crosspin.

A compression coil spring 56 is located in the bore of the quill I8 between a cross-pin 31 extending across the bore and the inner end of chuck 29 to urge the rod 26 to its outermost position with relation to quill I8. Another compression coil spring 55 is mounted between the quill I8 and the anvil 2| to provide constant frictional drag on the quill I8. The anvil is chambered as at 38 toseat one end of the spring and the quill is formed with a counterbore 39 to seat the other end thereof.

Turning of the anvil is prevented by a screw quill, the quill may be supported also for rotation thereby, but for additional independent support of the quill a ball bearing 46 may be provided within the housing and surrounding the quill. A look ring 41 may be provided for holding the bearing in place so that the outer race is fixed to the housing while the quill is free to slide through the inner race. A slip sleeve 48 may also be provided between the quill I8 and the bushing 36. Felt dust excluding rings 49, 50 may be provided between the lock ring 41 and the quill I8 and between the nose of the housing I5 and the anvil 2| respectively.

To provide indicating means for showing the position of the operating parts, the anvil 2| is constructed with an outer face 2] which will be flush with the nose of the housing I5 when the anvil is at its retracted position. Additional means for this purpose is provided by an arcuate plate 5| having sliding engagement with the housing I5 over the slot 4| and fixed to the anvil by the screw 40 which extends therethrough. An index mark 52 on the scale indicates the position of the anvil relative to an index mark 53 on the housing. The anvil 2| is preferably formed with a nose 2| of reduced diameter which extends beyond the face 2 I so as to provide a better view of the rivet and to permit use of the tool in crowded spaces, and longer noses and rivet-engaging rods than those shown may be employed when necessary.

The motor employed is preferably one that will not be injured by stalling of the upsetting mechanism and any motor having means for preventing injury thereto because of such stalling may be employed, or the shaft II may be the terminal portion of a rigid or flexible shaft driven from any power source through a clutch adapted to slip during a stall.

The reduced spindle I'l of the motor shaft is formed with a left-hand thread which engages a corresponding thread IS in the bore of the quill shaft so that rotation of the motor shaft in a clockwise direction, as seen when looking from the right in Fig. 2 will rotate the quill I8 and consequently the chuck 29 and rod 21 in the same direction.

In considering relative movements of the parts in the operation of the apparatus it is convenient to regard the housing l5 of the tool as being stationary in space so that the anvil 2| is regarded as moving in space with respect to the housing. This is the actual condition in some cases encountered in practice where the work is light and movable so as to be capable of being readily pushed away from the operator in the upsetting operation. In the case where the Work is fixed it will be understood that some parts of the tool including the housing I5 and rod 26 will be compelled to move back from the work during the upsetting in manifesting the relative movement between the anvil 2| and the housing I5 while the anvil 2| remains against the rivet in the fixed work. The action in upsetting the rivet is however essentially the same in the two cases.

The operation of the apparatus is as follows,

to communicate with each valve port by rotation of the valve. Cylinder "I has a port I24 at its closed end through its liner,communicating with I26 in the face of the flange I and with a passage I21 through the housing with groove I22.

Cylinder I02 has a port I30 at its closed end which connects by way o'fa passage I 3I, and a passage I32 with a groove I33 formed longitudinally of the cylinder back of its liner and extending to near the open end of the cylinder where it communicates with a passage I34 which connects it to groove I2 I Groove I23 is connected by passages I40 and MI with a recess I42 in the face of the housing I00 and a passage |43 in a plate I44 over the recess communicates with the open end or cylinder IN. A passage I45 also connects'passage I40 to cavity II3 oithe housing which is open to the open end of cylinder I02. The arrangement is such that with the valve member II4 in the position shown in Figs. 8 and 9 fluid under pressure supplied to passage H6 or the valve enters port H8 and travels sequentially through groove I2I, passage I34, groove I33 and passages I32, I3I, and port I30 to the lower end of cylinder I02, raising the piston I08, as seen in Fig, 8, and at the same time the left end of cylinder IN is opened to exhaust passage H1 and the atmosphere sequentially through port I24, grooves I25 and I26, passage I21, groove I22 and port I20, and housing cavity I13 which communicate with the open end of cylinder I02, is also opened to 1 exhaust through passage I45 sequentially through passages I40, groove I23, and port II9, the right end of cylinder I0l, as seen in Fig. 8 being also opened to exhaust by passage I43 and sequentailly through recess I42 and passages I4I, I40, groove I23, and port II9 to passage H1 and the atmosphere. I

By rotation of valve member H4 in a counterclockwise direction, as seen in Fig. 8, or counterclockwise as to the valve and clockwise as to the seat as shown in Fig. 14, through an angle of 120, fluid pressure will be supplied from passage II6 through port I I8 to groove I23 and by way of passages I40, I4I, I42, I43 to the right end of cylinder IN, and also from passage I40 through passage I45 to the cavity H3 and the open end of cylinder I02, while atthe same time the left end of cylinder IOI will be opened to exhaust through port I24, sequentially through groove I25, passage I26, I21, groove I22 and port II9 to passage H1, and, the atmosphere, and the lower end of cylinder I02 will be connected to exhaust through port I30 sequentially through passages I3I, I32, groove I33, passage I34, groove HI, and port I20 to passage H1 and the atmosphere so that piston I I I will be driven to the left in Fig. 8 and piston I00 will be lowered simultaneously. 7

In a third position of valve member H4 attained by further rotation thereof through a second angle of 120 in a counter-clockwise direction in Fig. 3, fluid pressure will be supplied from passage II6 through port II8 to groove I22 and by way of passage I21 grooves I26 and I25 and port I24 to the left end of cylinder IOI, while at the same time the lower end of cylinder I02 will be opened to exhaust through port I30 and sequentially through ports I3I, I32, groove I33, passage I34, groove I2I, port H0 and passa e II1 to the atmosphere and the cavity :III will be opened to exhaust by way of passage I45 and sequentially through passage I40, groove I23, port I20 and passage I I1 to the atmosphere, and the right end of cylinder IOI will be opened to exhaust sequentially through passage I43, recess I42, passages I4I, I40, groove I23, port I20 and passage II1 so that piston III will be moved to the right in Fig, 8 while the piston I08 will remain stationary.

The housing I00 is formed with a cylindrical bore I50, which opens at its lower side into the recess II3. A cylindrical plunger I5I is slidably mounted in the bore I50, a packing gland I52 being threaded on the housing at the mouth of the bore to compress a packing I53 about the plunger and prevent escape of pressure fluid thereabout to the atmosphere. A packing I5I may also be provided around rod I10 in the end of plunger I5 I.

A lever I54, of the first class, is pivoted on a pin I55 fixed in the housing I00. One end of the lever is bifurcated and its ends I56 are rounded so as pivotally to engage in slots I51 at opposite sides of the plunger. The arrangement is such that rotation of the lever on pivot pin I55 moves the plunger I5I longitudinally and the slotted arrangement prevents its rotation. A wedge member I60 is pivotally mounted at its thick end on a cross-pin I6I fixed to piston I08, the wedge being retained in a; slot I08 in the piston across which the pin I6I passes. Housin I00 is formed with a surface I62 parallel to the axis of cylinder I02, along which wedge I60 is adapted to slide upon movement of piston I08. The lower end of lever I54 is adapted to extend into the slot I09 of the piston and has a roller I63 rotatably mounted on a pin I64 fixed to the lever. The roller is adapted to cooperate with the inclined face of the wedge I60, A coil spring I59 is retained in the recess II3 by a screw plug I65 and impinges against the upper arm of the lever I54 to rotate the lever in a counter-clockwise direction as seen in Fig. 8 and holds its roller I63 againstthe wedge I60.

The upper end of the wedge is bifurcated so as to clear the spring and other parts including the plunger, the plunger being formed with opposite clearance slots I66 to receive the ends of the wedge in its elevated position. The arrangement is such that when piston I08 is raised, the wedge I60 engages roller I63 and swings lever I54 clockwise about pin I55 and'thus tends to force the plunger I5I to the right in Fig. 8, and when piston I08 is lowered, the spring I59 forces the plungerI5I into stock I60. Plunger I5I carries a tubular anvil I61 in a threaded counterbore I68 of its projecting portion for pressing against a hollow threaded rivet I69 to upset the same.

To provide for holding the threaded part of the rivet and the housing I00 in the same spacedapart relation while the anvil is advanced relative to the housing to upset the rivet, a rod I10 is rotatably journaled through the bore of plunger I5I, and anvil I61, and has an enlarged integral portion I1I rotatably retained in recess I42 against end movement. A pinion I12 for rotating the rod is located in recess I42, being retained on the rod by a pin I13. Rod I10 is threaded at its outer end where it projects beyond the anvil to engage the threads of the rivet and retain the rivet against the anvil. When a rivet is pressed'against, by the anvil I61, the rivet being on the threaded portion of the rod, the rivet is held in spaced-apartrelation to the housing *9 by the rod While'the-anvil'is advanced along the .rod and the rivet is collapsed orupset as at I15. The anvil may be 'adjusted'in relation to'the plunger to adjust it to rivets of different lengths and a lock nut I14 also beingprovided to hold it in adjustment. Atthisstage the parts are related as shown 'in'Fi'g; 8.

To providefor rotating the rod I10 to engage and disengage a rivet, the housing I is formed with a bore 200-parallel to the axis of the plunger I-I and extending across the recess 3. A tubular guide I is provided as a linin for this bore, and a longitudinal slot I45 is formedthrough its wall on the lower side throughout its length except for a short distance at the right end of the tube as seen in-Fig. 8. A piston rod IOI is fixed to piston I II "and is slideably mounted in the bore of thetubular guide I80. A pin I 02 in the side of therod extends into'and is guided by the-slot I45so as to prevent rotation'of' the rod. The rod.

'isformed with a helicalgroove I83 of great pitch with respect to its circumference, and preferably at a pitch angle of less than 45. A gearwheel I84 isrotatably' mounted in the recess I42 about the rod I 8| and hasa key I85 in its hub which en- "gages in the groove I 83. The-gear I84 meshes with pinion I12, The-arrangement is-such that when piston I I I is oscillated i-ncylinder I:0I,rod 'I'8'I is drawn through the hub of :gear I04 causing rotation of'rod H0. Groove I80 isa righthand helix and movementofthepiston III to- "ward'the right asrseen in Fig.--8 to the position illustrated-causes therod 1-10 to rotate in a righthand direction adapted to screw the rod N I5I- into the rivet which has :a right-hand thread, and" 'movement of the piston tothe left causes thelrod to"release-the rivet. *A-sorew-plug I 06engages in a threaded opening in thehousing I 00 and holds the tubular guide 100 in place.

For supplying fluid-under pressure tothevalve, "a plate Iis secured -against=the housing I00 about the valve I'M-and hasatubularinlet IOI threaded to' receive a hosecoupling. Apassage I92 is formed in its housing-contacting faceand connects the inlet with the-space I I0 of the valve member through radial ports IIl-3iormed i-n-the valve member and communicating constantly with "the passage I02 -which':-surrounds the valve stein. "Screws "I94 hold the plate -I90 insealedre- "lation to the 'housingIIBII; Thesmall end ofvthevalve member" I I dis threaded *as at. I95 =andhas an axial keyway I'M? 'A-washer I96 surrounds the thre'adedend in contact wi-ththehousing I00 with'a'key I9 5 thereof entering thekeyway l W. -A- threaded nut I01 engages the threads of the waive-member over thewasher and may be used to adjusttheseatingof the valve. The opposite end of the "valve-member'is -also threaded as at 'I-M to engage a knob lfifl having a threaded "bore. A set-'screwlea-threadedthrough the hub of-the knobmay betightened to hold the knob\ 'in posit-ion. "The knob may be formed with notches wflto indicatethepositions of its ports and a sprin indeX-iingen-ZDI-may be provided on the 'plate'lil-toengage one of the notches frictionally at a positionwhere the valve ports are inaligmnentand to act=as an indicator.

As in the-case of the description ofvthe operation-of the embodimenhfirstdescribed, it is convenient' in-considering the operationof the embodimentof Figs 6 30-14 to regardthe housing *I00 of the tool, rather than-the work, as fixed, so that relative movementswill bemanifested as movementsin space-oft-he anvil I01 and other operating parts within the housing. However,

in the case where-the workis-flxed itwillbe unf derstoodthat the anvil I81 remains. againstthe rivet in the work and'the relative movement between the anvil I61 .and' housing I00 during the upsetting will be manifestedlas-a rearward movement of thehousing I00 andlrod. I10, the'essential action being the same in-vthetwo cases. The

operation of theapparatusis as follows: The operator holds the :tool .by the cylinder I0-2'with his right hand with the anvil I 61 away from him and the threadedv rod I10. against. the threaded aperture of a tubular threaded rivet I61, the valve member v I I 4' being at its inacti've position, that is the .positionwhere its-port I I8 is in register w-ithi oove I23. In this position. of the valve air under. pressure enters from hose connection I9! bywaymoflpass-ages I92 I93, H6, H8 and groove I23-through passages IMI-and'I IE to re- I I I9 and. I-I-Itotheatmosphere, andthe lower end of cylinder I02 being opened 'toexhaust sequentially through..passages I30, I3I,t I32, I33. I34,

-gl-OOVe.I-2I and. passages I20, II 1 to theatmos- ,phere,

The valve member :1 His .thenrotated 1 20in a counter-clockwisedirection asseen in Fig. 8 to bring port I I8. into communication with groove I22. At this position ofthe 'valve fluid under afiipressure from'arhose c onnected 'to connection I9 I passes ,sequentiallylthrough passages. I 92, 93, H6, H8, groove I22,..passagesI2-I,I26, I25 and port-I24 to theleft ;end of cylinder IIlI driving piston- III -to the right, that is, to the position shown in Fig. 8. Piston rod I8I iscarried forward by the piston and is prevented from rotating. by pin I82 engaging in slot I45 The piston vrod slides through gear I8 which is rotated by en gagementofits'key I85 with helical groove I83 and rotates, pinion 7 I12 and consequently rod I10 in "a right-.hand-direction screwing the rod into ther-ivet I69, movement of. the piston I II being stopped either-by engagement of the flange of the rivet I60with the anv'il IBI or by the piston -reaching the. end ofthe cylinder. At the same .timeithe right end of cylinder I'0I is opened to .exhaustby way of passages I43, I42, I41, I40, -groove-I23,- passages I20 and III to the atmosphere, recess I I3 is also opened to exhaustby way vof passages I45, I 40, groove I 23 and passages I20 and I I1, and the.lower end of cylinder I02 is opened to exhaust sequentially by way of passages I30, I3I, I32, I33, I34, groove'f2lfand'passages IIOand II! to the atmosphere so th'atg plston I08. remains stationary,

.Theoperator. then turnsthe valve member another 120 in a'counter-clockwisedirectionias seenin Fig. 8 to the next valve position. In the new valve position, air'under "pressure from the hose connection, IOI passes sequentially byway of, passages I02, I93, "H6, LIB/groove 121 and passages I34, "I33, I3I2,I3I, I30fto the lower'end of cylinder I02, and recess "H3 is openedtoexhaust sequentially by way 6fpassages105, I40, groove I23, and passages I'I'IlfI'II'to'theatmosphere, so that piston'IIlB 'i's d'riven upwardly carrying wedge I 60, VVdge Iffill 'caus'es lever I'M-t0 swing in a clockwise direction, as seen in Fig.-'8, by contact with roller 'I6'3'thus pushing plunger [51 and anvil in "forward withrelati'on'tothe 11 housing I00,the threaded part of the rivet being held by the rod I10 against movement with relation to the housing. At the same time, piston II 1 and passages I 20, H1 tothe atmosphere and the right end of the same cylinder is open to the atmosphere sequentially by way of assages I43, I42, I4I, I40, groove I23, and passages H3, H1.

After the rivet has been upset, the operator turns valve member I I4 in a counter-clockwise direction, as seen in Fig. 8, through an angle of 120 to a position where port II8 again registers with groove I23. In this position, air under pressure enters connection I9l sequentially by way of passages I92. I93, H6. H3, groove I23, and passages I 40, I45 to chamber H3 and thence to the too of the piston I08 and also by way of passages I40, Ill, I42, I43 to the right end of cylinder IOI, while at the same time the left end of cylinder IN is opened to exhaust sequentially through passages I24. I25, I20, I:21,.groove I22 and passages II9, H1. and the lower end of cylinder I02 is opened to the atmosphere sequentially through passages I30, I3I. I32, I33, I34, grooveI2I. passages I20 and I I1, resulting in return of piston I03 to the lower end of cylinder I02 and return of piston III to the left end of cylinder IOI, causing the rod I10 to rotate in a counter-clockwise direction to unscrew it from the rivet, while. at the same time plunger I5 I andanvil I61 are withdrawn into housing I 00.

The anvil is in full sight of the operator at all times. The rod I may be replaced by removing screws I08. cylinder I M, and plate I13.

Variations may be made without departing from the scope oi the invention, as it is defined by the following claims.

I claim:

1. Apparatus for upsetting a hollow threaded rivet, said apparatus comprising a mandrel having a threaded portion engageable .in the threaded bore of the rivet. an anvil engageable with the rivet. a support for the mandrel and the anvil. the anvil being movable with relation to said support'and along the mandrel, resilient means urging said anvil with-relation to said support in a direction away from the threaded end of said mandrel, and meansfor moving said anvil in the opposite direction against said resilient means to upset a rivet engaged by the threaded end of said mandrel.-

2. Apparatus for upsetting a hollow threaded rivet, said a paratus comprising a mandrel having a threaded portion engageable in the threaded bore of the rivet. means for rotating the mandrel to engage and disengage the rivet. an anvil engageablewith the rivet, a support for the mandrel and the anvil, the anvil being movable with relation to said support and along the mandrel.

resilient means urging said anvil with relation to said support in a direction away from the threaded end of said mandrel and means for moving said anvil in the opposite direction against said resilient means to upset a rivet engreeted by the threaded end of said mandrel.

3. Apparatus for upsetting a hollow rivet having a threaded opening; said apparatus comprising a hollow non-rotatable anvil. a rod having a threadedend slidably projecting through said anvil and formed and arranged to engage the threaded opening of the rivet, a support for said anvil and said rod, means for rotating said rod to mount a rivet thereon against said anvil, means for restraining said rod against longitudinal movement with relation to said support, means yieldably urging said anvil with relation to said rod in a direction away from the threaded end of said rod, and means for moving said anvil with relation to said rod and said support toward the threaded end of the rod and outwardly of the support against pressure of the last said means for applying an upsetting force to the rivet.

4. Apparatus for upsetting a hollow rivet having a threaded openin said apparatus comprising a housing adapted to be held by the operator, a power driven shaft journaled therein, a nonrotatable hollow anvil slidably mounted in said housing, a rod having a threaded end projecting through said anvil to engage the threaded opening of the rivet, a member rotatably and slidably mounted in said housing, driving means on said member for supporting and slideably positively rotating said rod, said member and said power driven shaft having screw means engaging each other for manipulating said member in rotative and axial movements, means including an element on said member for engaging and moving said anvil axially with relation'to said rod during an axial movement of said member in a direction toward the rivet to apply an upsetting force to the rivet secured to said rod, and means for limiting axial movement of said rod relative to said housing during the axial move ment of said anvil in a direction toward the threaded end of the rod for applying the upsetting force.

5. Apparatus, for upsetting a hollow rivet having a threaded opening, said apparatus comprising driving means rotatable in opposite directions, an extension member having threaded conneotion with said driving means and movable thereby in axial and rotative movements, a sup port for said driving means and said member, a threaded rod adapted to engage the threaded opening in the rivet and adapted to be rotated by said driving means and said extension member, stationary means on said support for limiting axial movement of said rod, a hollow non-rotatable anvil about said rod. and means including an element on said extension member for relatively moving said anvil axially of said rod in a direction toward the threaded end of said rod to upset a rivet thereon while axial movement of said rod with respect to said support is restrained.

6. Apparatus for upsetting a hollow rivet having a threaded bore, said apparatus comprising a housing, a rod in said housing having a threaded end projecting therefrom, means for rotating said rod to engage the threaded end of the latter with and to disengage the same from said rivet. a hollow anvil through which said red extends, said anvil being mounted for relative movement with respect to both said housing and said rod in a direction toward said threaded end to apply an upsetting force to said rivet, and means for effecting such relative movement.

'7. Apparatus for upsetting a hollow rivet having a threaded here, said apparatus comprising a housing. a rod in said housing having a threaded end projecting therefrom, means for rotating said rod to engage the threaded end of the latter with and disengage the same from said rivet. a ho1- low anvil through which said rod extends. said anvil on the one hand and said support and said mandrel on the other hand being moveable one anew-am I :13 a springorgingsaid anvihawayfrom the threaded end of the rod, and meansfor moving the andriving shaft,--a-driven shaft having a telescopic connection-with said-drivingshaft, the telescoping portions of-saidshafts being'in threaded en- ;gagement to permit a relative axial movement of to be insertedinto said tubular rivet, an anvil non-rotatable in the tool and slideable axially with respect to and surrounding said bit and adapted to abut against the tubular rivet when the rivet is advanced along said bit by the rotation of said driven shaft longitudinally of the bit into operative engagement with the anvil, a spring normally urging said anvil away from the rivet-engaging end of said bit, and means operated upon the rivet being held against rotation by engagement of the rivet with said anvil to halt rotation of said driven shaft, thereby overcoming said friction clutch to permit an axial movement of said driven shaft and said anvil to collapse said rivet against the anvil.

9 A rotary tool for upsetting internally threaded tubular rivets, comprising a rotatable driving shaft, a driven shaft, a first friction clutch between said shafts causing said driven shaft normally to turn with said driving shaft, a threaded bit movable with said driven shaft and adapted to be inserted into said tubular rivet, an anvil non-rotatable in the tool and slideable axially with respect to and surrounding said bit and adapted to abut against the tubular rivet when the rivet advances axially along said bit and is operatively engaged therewith, a spring normally urging said anvil away from the rivetengaging end of said bit, a second friction clutch of which said anvil comprises one element interrupting rotation of said driven shaft and said bit after a relative axial movement of predetermined extent between said anvil and the rivet, said second friction clutch being adapted to overcome said first friction clutch, and means operable upon the disabling of said first friction clutch for effecting axial non-rotating movement of said driven shaft relative to said anvil, to upset the rivet by advance of said anvil relative to said bit.

10. A rotary tool for upsetting internally threaded tubular rivets, comprising a rotatable driving shaft, a driven shaft having a telescopic connection with said driving shaft, the telescoping portions of said shafts being in threaded engagement to permit a relative axial movement of said shafts when one is turned relatively to the other, a first friction clutch normally preventing relative turning movements of said shafts, a threaded bit secured in said driven shaft in axial alignment therewith and adapted to be inserted into said tubular rivet, an anvil non-rotatable in the tool and slideable axially with respect to and surrounding said bit and adapted to abut against the tubular rivet when the rivet is advanced by the rotation of said driven shaft longitudinally of the anvil into operative engagement with the anvil, a spring normally urging said anvil away from the rivet-engaging end of said bit, and a second clutch enabled by the relative longitudinal movement of said anvil and the bit for halti against "the -anvil.

'14 .inglrotation of-said dri-venlshaft and said bit to .permit a turning movement of said driving shaft relative to said driven shaft-and a consequent axial non-rotating'movement of said driven shaft and said bit-in a direction to collapse said rivet 11. A powertool for installing intern-ally threaded flanged clinch nuts comprising a housiingadaptedto' be manuallysupported, an anvil :non=-'rotatably-and slidably -mounted in said housing and adapted to project beyond the front end thereof, thefront end of the anvil having a face adapted-to-seat against the flange of the clinch nut, a springnormallynrging said anvil inwardly of said housing, a bit surrounded by the anvil .andsupponted thereinrzforrelative rotary and axial movements, the front:end of the bit projecting beyond the anvil and being threaded for engagement with the internal threads in the clinch nut, power operated means for imparting first rotary and then axial movement of the bit relative to the anvil for installing the clinch nut, and power operated means for imparting axial and rotary movements of the bit relative to the anvil for restoring the parts of the tool to normal condition, said anvil being movable axially relative to the housing in one direction outward of said housing against the pressure of said spring while the clinch nut is being installed and in the opposite direction while the parts are being restored to normal.

12. Apparatus for upsetting a hollow rivet having a threaded bore, said apparatus comprising a housing, a driving shaft within said housing, a driven shaft within said housing having threaded engagement with said driving shaft for effecting relative axial movement therebetween" as a result of relative rotational movementthereof, a bit in driving engagement with said driven shaft having a threaded end extending beyond said housing for engaging the threaded bore of a rivet, a non-rotatable anvil surrounding said rod in sliding engagement therewith and slideably mounted in said housing, cooperating friction means in addition to said threaded engagement on said shafts for frictionally driving said driven shaft and said bit in a direction to enter the threaded end of said rod in the bore of the rivet and seat said rivet against said anvil, means effective upon contact of the rivet with said anvil and tensioning of said rod for overpowering said friction means and effecting an axial movement of said driven shaft and thereby said anvil in a direction outwardly of said housing toward the rivet, and means for limting movement of said rod in the same direction during outward movement of said anvil to upset the rivet.

18. Apparatus for upsetting a hollow rivet having a threaded bore, said apparatus comprising a housing, a driving shaft within said housing, a driven shaft within said housing having threaded engagement with said driving shaft for effecting relative axial movement therebetween as a result of relative rotational movement thereof, a bit having driving engagement with said driven shaft and having a threaded end extending beyond said housing for engaging the threaded bore of a rivet, a non-rotatable anvil surrounding said rod in sliding engagement therewith and slideably mounted in said housing, spring means between said housing and said anvil normally holding said anvil in a retracted position, cooperating friction means in addition to said threaded engagement on said shafts for frictionally driving said driven shaft and said bit in a direction to enter the threaded end of said rod in the bore of the rivet and seat said rivet against said anvil, means effective upon contact of the rivet with said anvil and tensioning of said rod for overpowering said friction means and effecting an" axial movement of said driven shaft and thereby said anvil against pressure of said spring means in a direction outwardly of said housing toward the rivet, and means for limiting movement of said rod in the same direction during' outward movement of said anvil to upset the rivet.

RAY H. GILL.

REFERENCES CITED The following references are of record in the file of this patent Number Number Certificate of Correction Patent No. 2,437,191; March 2, 1948. RAY H. GILL It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 12, line 20, for the words for supporting and slideably read for slideably supporting and; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 25th day of May, A. D. 1948.

THOMAS F. MURPHY,

Assistant Commissioner of Patents. 

